Originally Posted By: tonycarguy
What are the pros and cons of using a motor oil advertised as "for diesels" in a gas engine? Let's assume it's SL/SM rated, and the viscosity is appropriate for the engine & climate.
I have also been trying to get a definitive answer on this. For example,
Mobil 1 Turbo Diesel Truck 5W-40's product page reads:
Originally Posted By: "Mobil 1 Turbo Diesel Truck 5W-40"
Applications
Mobil 1 Turbo Diesel Truck 5W-40 is recommended for use in all super high performance diesel applications, including modern low emission engine designs with Exhaust Gas Recirculation (EGR). These applications include the following:
- On-highway engines operating in both high speed/high load and stop-and-go conditions
- Off-highway engines operating in severe low speed/heavy load conditions
- Virtually all diesel powered equipment from American, European, and Japanese equipment builders
- High performance gasoline engines and mixed fleets
- Refrigeration units
Specifications and Approvals
API CJ-4, CI-4 PLUS/CI-4/CH-4/CG-4/
SM/SL/SJ
Besides a pair of Saturn SL2s (1998 & 2001), I also have a 2002 Camaro SS (5.7L), a 2002 Toyota Sienna (3.0L), a 2003 Impala LS (3.8L), and a 1965 Barracuda (225). All of the newer cars require 5W-30 oils. Toyota specifies SL/SJ while GM only specifies Starburst. I would like to use a 0W-30 CJ-4/SM/SL/SJ synthetic oil (
Esso XD-3 Extra) in all of them but my concern is with cat/02 poisoining. Since the Starburst seems to have more to do with fuel economy that engine protection, I think I can probably live without API Starburst oils in these engines.
Can anyone tell me if CJ-4/SM synthetic HDEOs will cause cat/O2 failure quicker than the SL/SJ PCMOs specified for these engines.